Senior full-stack engineer: TypeScript, React, React Native / Expo, Node.js. 10+ years building and running the software behind a production buy-sell-trade commerce business.
Open to senior full-stack roles (remote, hybrid, or on-site) and freelance work. Based in Lincoln, NE.
jaydeaton.com · LinkedIn · jayrdeaton@gmail.com · npm (55+ packages) · infinitetoken.com
Full-stack engineer and co-founder at Infinite Token since 2016. That code is private, so here's the summary:
- Core engineer on a 3-6 person team: 6 internal apps (React, React Native, Electron), a central Node/Express API, and databases serving 3 retail locations, 25 staff, and tens of thousands of customers
- Integrated Shopify, eBay, Google, AWS, and POS hardware into one system
- Migrated hundreds of thousands of records across databases with zero data loss
- Led the move to TypeScript, plus Jest testing and org-wide linting standards
- Built and launched Lumber, an end-to-end encrypted logging service for iPhone, iPad, Mac, Windows, and Linux: a Node SDK, Express and WebSocket servers on Supabase, and a CLI that decrypts logs for AI agents over MCP
The code is private, but I'm happy to walk through the architecture.
- Lumber (App Store, Microsoft Store): end-to-end encrypted cloud logging for iPhone, iPad, Mac, Windows, and Linux. A Node SDK encrypts each log with AES-256-GCM before it leaves the server, so the Express API, socket.io server, and workers on PostgreSQL (Supabase) only ever hold ciphertext. Each app key is wrapped per user with X25519, and new devices and teammates are confirmed with short codes over CPace. Clients: an Expo app, its Electron build for Mac, Windows, and Linux, and a CLI that hands decrypted logs to AI agents over MCP
- SlingScan (App Store, Microsoft Store): turns an iPhone into a wireless barcode scanner for a Mac, Windows PC or Linux computer. Scans go straight to the computer over the local network, each WebSocket frame sealed with AES-256-GCM under a key shared by scanning a pairing QR code, and an Electron app types them into the app in front like a USB scanner, through macOS's CGEvent API, Windows' SendInput, X11's XTest, or Wayland's RemoteDesktop portal. The iPhone app is Expo and React Native Paper, with an offline outbox and a StoreKit 2 one-time unlock
- CashierFu: point-of-sale for small retailers: a Nuxt web app, native iOS and macOS apps in Swift, a WebSocket server, and an Express API with sales and inventory analytics. Each shop connects its own Stripe account to take cards on Stripe Terminal readers
- CashierFu-Utility: CashierFu's React Native / Expo companion app: shop staff turn products into trackable units, move and audit stock across containers, photograph units for the storefront, and print labels on Zebra Bluetooth printers through native modules. The same codebase also builds against MediaEncyclopedia's API, each backend from its own EAS profile
Modular game-engine packages (game loop, physics, input, HUD, sprites, grid, cards, profiles, achievements, split-screen pass-and-play, and the app shell around them) that power my Expo games. PuckTastic (BoxHockey until 2.0) and Swirlio are the first on the App Store, with more games and Google Play on the way. Play the web versions at games.infinitetoken.com.
- React-Native-Game-Core (
@tastic/core): frame-rate-independent game loop, vector math, orientation handling, background pause - CardTastic (play): ad-free, offline collection of 20 card games (11 solitaire, 9 for two to four players with CPU opponents) for iOS, Android, and web on a shared TypeScript card engine
- DuelTastic (play): four duel games in one app (Trap, Turf, Tag and Snake) on the shared game shell, head to head on one phone or against flood-fill and distance-field CPUs
- Hangman (play)
- PuckTastic (play, App Store): four tabletop puck games in one app (Box Hockey, Air Hockey, Paddles and Breaker) on one physics engine, with sub-stepped puck physics and CPUs that predict the puck or pick shots by simulating them
- Swirlio (play, App Store): kaleidoscope toy drawn in Skia with up to 12 mirrored copies, 150 colliding beads simulated on the UI thread, and a mic-driven audio-reactive mode
| Project | Live | Description |
|---|---|---|
| MapFolio | mapfolio.infinitetoken.com | Interactive map builder: pins, routes, captions, print-to-PDF, and share links that encode the whole map in the URL |
| TrimBox | trimbox.infinitetoken.com | Gmail inbox cleaner: scans up to 10,000 messages, surfaces bulk senders, one-click unsubscribe and bulk archive |
| SnaPDF-Web | snapdf.infinitetoken.com | Snap ChatGPT and Claude conversations to searchable PDF or text |
| Pixelated-Web | pixelated.infinitetoken.com | Browser-based image pixelation with palettes and dithering |
| GraPDF-Web | grapdf.infinitetoken.com | Scrape PDFs from a webpage and merge them into one booklet |
@rific: Expo / React Native utilities
| Package | Description |
|---|---|
@rific/updater |
OTA update hook for Expo plus the build and update release CLI |
@rific/sync |
SQLite sync engine for Expo: schema management, upserts, deletions, cursor tracking |
@rific/scanner |
Camera barcode scanner with customizable overlays |
@rific/auto-paper |
Adaptive triadic theming for react-native-paper |
@rific/toaster |
Animated toast notifications |
@rific/heatmap |
GitHub-style activity heatmap |
@rific/timer |
Animated timer ring |
@rific/resizable-input |
Resizable multiline input |
@rific/focus-chain |
Auto-incrementing focus chain hook for form inputs |
@rific/feedback-press |
Haptic pressables |
@rific/scroll-view |
ScrollView, FlatList, and SectionList with blurred floating headers and pull-to-search |
@rific/drawer |
Spring-animated drawers and sheets that slide in from any screen edge |
@rific/gestures |
Swipe-to-dismiss with flicks, and pinch-to-zoom about the fingers, measured in the view's own coordinates |
@rific/splash-gate |
Holds the splash screen until named async conditions are ready |
@rific/core |
Settings Context and Redux slice factories shared by the other packages |
| Expo-Starter | Production-ready Expo starter with Redux, Paper theming, OTA updates, and @rific pre-wired |
@tastic: React Native game engine
| Package | Description |
|---|---|
@tastic/core |
Vec2 math, frame-clamped game loop, orientation handling, background pause |
@tastic/physics |
2D arcade physics: circle and rect collisions, bounces, friction, gravity wells, springs |
@tastic/input |
Worklet-safe input: swipe and keyboard direction, drag aiming, flick velocity |
@tastic/hud |
Non-modal UI kit for local multiplayer: popovers, pickers, gauges, and dialogs per player zone |
@tastic/split-screen |
Face-to-face or side-by-side two-player layouts based on how the device is held |
@tastic/grid |
Grid math for tile games: bounds, cell/pixel conversion, adjacency, BFS reachability |
@tastic/sprites |
Shared Skia and SVG effects: fireworks, gravity wells, pucks, rink markings |
@tastic/cards |
Playing-card rendering: faces, backs, court figures, suit pips |
@tastic/profile |
Per-seat player profiles with picker and roster screens |
@tastic/achievements |
Headless achievement and stats engine: tiers, per-profile unlocks, streaks |
@tastic/edge-guard |
Config plugin and hook that keep iOS edge swipes from firing over game controls |
@tastic/shell |
The app around a pack of games: Home, loadouts, stats, profiles, settings, and one persisted Redux store, driven by a single pack definition |
Node.js / CLI
| Package | Description |
|---|---|
termkit |
Fluent CLI framework: nested subcommands, middleware, type coercion |
cosmetic |
Chainable ANSI color and style library for terminals |
snapdf |
CLI + ESM/CJS package behind SnaPDF, handling virtual scrolling |
grapdf |
CLI + ESM/CJS package behind GraPDF |
pixelated |
CLI + library: 40+ retro palettes, 20+ block shapes, dithering, ANSI output |
reunite · deplace |
Small macOS terminal utilities |
- Languages: TypeScript, JavaScript, Python, Swift, Ruby, HTML/CSS
- Frameworks: React, React Native, Expo, Node.js/Express, Electron, Vue/Nuxt
- Data: PostgreSQL, MongoDB, SQLite, Supabase, offline-first sync
- Platforms: AWS, Docker, Vercel, Heroku, GitHub Actions, npm publishing
- Integrations: REST, GraphQL, WebSocket, Bluetooth, Shopify, eBay, POS hardware, Google & Anthropic APIs
- Testing: Jest, unit and integration
Arduino projects, Fusion 360 macros, 3D printing, and 6502 assembly games (Snake, LightCycles), playable in the browser at games.infinitetoken.com.